var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
const urlModule = require("url");

// session
const session = require("express-session");

var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');
var booksRouter = require('./routes/books');
var readersRouter = require('./routes/readers');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({
	extended: false
}));
app.use(cookieParser());

// 使用 express-session 中间件，使得 Express 应用支持 session 处理
app.use(session({
	secret: 'gongsiyaodui',
	resave: false,
	saveUninitialized: true,
	cookie: {
		maxAge: 30 * 60 * 1000
	}
}));

app.use(express.static(path.join(__dirname, 'public')));

app.use('/', indexRouter); // 访问 "/" 目录下的资源
app.use('/api/users', usersRouter); // 访问"/api/users"目录下的资源
app.use('/api/books', booksRouter);
app.use('/api/readers', readersRouter);// 访问"/api/books"目录下的资源

// catch 404 and forward to error handler
app.use(function(req, res, next) {
	next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
	// set locals, only providing error in development
	res.locals.message = err.message;
	res.locals.error = req.app.get('env') === 'development' ? err : {};
	// render the error page
	res.status(err.status || 500);
	res.render('error');
});

module.exports = app;
